Spin-trimer antiferromagnetism in La4Cu3MoO12

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dc.contributor.author Qiu, Y.
dc.contributor.author Broholm, C.
dc.contributor.author Ishiwata, S.
dc.contributor.author Azuma, M.
dc.contributor.author Takano, M.
dc.contributor.author Bewley, R.
dc.contributor.author Buyers, W.J.L.
dc.contributor.author Buyers, W.J.L.
dc.date.accessioned 2010-01-11T18:48:43Z
dc.date.available 2010-01-11T18:48:43Z
dc.date.issued 2005-06-01
dc.identifier.citation Physical Review B (Condensed Matter and Materials Physics) 1 June 2005, vol.71, no.21, pp. 214439-1-8 en
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/33766
dc.description.abstract La4Cu3MoO12 is a cluster antiferromagnet where copper spin-1/2 trimers form a network of strongly coupled spin trimers. The magnetic properties of this material have been examined using magnetic neutron scattering. At low temperatures, excitations from the ground state are observed at 7.5(3) meV and 132.5(5) meV. An additional peak in the neutron scattering spectrum, which appears at 125.0(5) meV on heating, is ascribed to a transition between excited states. The wave vector and temperature dependence of the inelastic magnetic scattering cross section are consistent with intratrimer transitions. Magnetic neutron diffraction reveals antiferromagnetic order below TN=2.6 K with a wave vector (½00). The ordered magnetic structure is described as intertrimer order where spin correlations within trimers are controlled by the strong intratrimer interactions. Combining the information derived from elastic and inelastic magnetic neutron scattering with group theoretical analysis, a consistent set of intratrimer interactions and ordered magnetic structures is derived. The experiment provides a simple worked example of magnetism associated with interatomic composite degrees of freedom in the extreme quantum limit. en
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dc.description.provenance Made available in DSpace on 2010-01-11T18:48:43Z (GMT). No. of bitstreams: 1 Broholm Spin-trimer 2005.pdf: 212003 bytes, checksum: 5b761244fbf13b38beed90912daf5ab6 (MD5) Previous issue date: 2005-06-01 en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.subject intratrimer transitions en
dc.subject inelastic magnetic scattering cross section en
dc.subject copper spin-1/2 trimers en
dc.subject cluster antiferromagnet en
dc.subject spin-trimer antiferromagnetism en
dc.subject group theoretical analysis en
dc.subject spin dynamics en
dc.subject neutron diffraction en
dc.subject interatomic composite degrees of freedom en
dc.subject 7.5 meV en
dc.subject 132.5 meV en
dc.subject 125 meV en
dc.subject 2.6 K en
dc.subject lanthanum compounds en
dc.subject group theory en
dc.subject ground states en
dc.subject excited states en
dc.subject copper compounds en
dc.subject antiferromagnetic materials en
dc.subject La4Cu3MoO12 en
dc.title Spin-trimer antiferromagnetism in La4Cu3MoO12 en
dc.type Article en

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